I have a simple code that forks a child process. 
#!/usr/bin/perl
my $pid = fork;
if ($pid == 0) 
{
    # Child process
    print "Inside child process\n";
    exit 1;
} 
elsif ( $pid > 0 ) 
{
    # Parent process
    print "Inside parent process\n";
} 
else 
{
    # fork error
    print "ERROR! PID : $pid \n";
    exit 1;
}

[download]
On running this under Windows 2000 on a Pentium 4 system, it gave the following error:

The Unsupported function fork function is unimplemented

Is fork not supported on Windows 2000 ? Please do clarify..and enlighten this young monk

In reply to perl fork cmd on Windows 2000 by TheYoungMonk

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